<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input v-model="name" type="text" />
    </div>
    <div>
      <span>年龄:</span>
      <input v-model="age" type="number" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button>删除</button>
            <button @click="edit(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      name: "",
      age: 0,
      gender: "",

      editIndex: null,
      arr: [
        { name: "张三", age: "18", gender: "男" },
        { name: "李四", age: "18", gender: "男" },
        { name: "王二麻子", age: "18", gender: "男" },
      ],
    };
  },
  methods: {
    add() {
      //非空校验
      if (!this.name || !this.age) {
        alert("姓名或年龄不能为空");
        return;
      }
      //   let id = this.arr.length ? this.arr[this.arr.length - 1].id + 1 : 1;
      const obj = {
        name: this.name,
        age: this.age,
        gender: this.gender,
      };
      if (this.editIndex !== null) {
        this.$set(this.arr, this.editIndex, obj);
      } else {
        this.arr.push(obj);
      }

      this.name = this.age = "";
    },
    edit(index) {
      this.name = this.arr[index].name;
      this.age = this.arr[index].age;
      this.gender = this.arr[index].gender;
      this.editIndex = index;
      //   const obj1 = {
      //     id: index,
      //     name: this.name,
      //     age: this.age,
      //     gender: this.gender,
      //   };
      //   //   this.arr.splice(index,1)
      //   //   this.arr.phsu(obj1)
      //   this.$set(this.arr, index, obj1);
    },
  },
};
</script>